ThetroublesbeginforJoePalooka,theheavyweightchampionoftheboxing-world,whenhismanager,KnobbyWalsh,receivesananonymousnotefromaracketeer-groupintentonloweringtheoddsoJoeinhisupcomingdefenseofhistitle.Andhemistakenlybelievesthatayounghoodlumhehasbefriendedhasturnedagainsthim.